What is the main role of isoheights on a weather map?

Isoheights on a weather map serve the purpose of illustrating lines of constant heights, specifically above a reference level, usually above sea level. These lines connect points that have the same altitude, allowing meteorologists to visualize the vertical structure of the atmosphere. By examining isoheights, one can determine the distribution of high and low pressure systems, which are crucial for understanding weather patterns and phenomena.

The arrangement and spacing of isoheight lines are also important, as closely spaced lines indicate steep gradients in height, suggesting a rapid change in atmospheric properties. This can have implications for wind patterns and the potential for weather systems to develop. The concept of isoheights contrasts with other lines on weather maps, such as isotherms, which represent constant temperature, and isolines for humidity or other parameters. Therefore, isoheights specifically highlight the relationship between altitude and pressure in the atmosphere.